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Finding the Fourth Proportional to 520,290.57, 718,116.74 and 316,298.25

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Solution

The fourth proportional to 520,290.57, 718,116.74 and 316,298.25 is: 436,561.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,290.57 : 718,116.74 = 316,298.25 : x
  2. Step 2: Convert to fraction form
    520,290.57/718,116.74 = 316,298.25/x
  3. Step 3: Cross multiply
    520,290.57x = 718,116.74 × 316,298.25
  4. Step 4: Simplify right side
    520,290.57x = 227,139,067,762.33
  5. Step 5: Solve for x
    x = 227,139,067,762.33/520,290.57
  6. Step 6: Final answer
    x = 436,561.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.